Description: This motorcycle helmet headsetis a necessity for riders of motorbikes, quads, bicycles, etc. It will help you get phone callings conveniently and listen music without much noises. You deserve it! Features: Wireless listen to to music with integrated Bluetooth technology. Fashion design, let music surrounding your life any time. Hands free function, truly free your hand. Set-in rechargeable Li-ion battery, long stand-by and working time. With CSR chip and Bluetooth 4.0 technology, Hi-Fi earphone. Support power displaying on cellphone, easy to know when will to be charged. DIY design, available to be detachable when you want. Sound reminder function, easy to set the device according to sound remind. Specifications: Material: Plastic Color: Black Bluetooth Version: 4.0 + CSR Chip Frequency: 2.402GHZ - 2.480GHZ Distance: approx. 10m Transmission Distance of Microphone: < 1m Battery Capacity: 3.7V / 150mA Playtime: <= 8 hours Charging Voltage: 5V Charging Time: about 1 hour Length of Line: 450mm/17.7" Package Weight: approx. 154g Package Included: 1 x Helmet Bluetooth Headset 1 x USB Cable 1 x User Manual .